Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"icosahedron"”.
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Structural Analysis Of Bulky Thiolate-Protected Gold Nanomolecules
… ligands routinely support the formation of an icosahedron-based series of core-size gold nanomolecules. Within this series of nanoparticles, Au25(SR)18 and Au38(SR)24 are among the most commonly studied core-sizes; Au25(SR)18 is situated upon an Au13 icosahedron, and Au38(SR)24 upon two …
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Nuclear magnetic resonance studies of dynamic cobalt and rhodium clusters in solution and in the solid state
… mechanism, which is the expansion of the ligand icosahedron into a cubooctohedron. Because of the constraints imposed by the bisphosphine ligands, only one ligand icosahedron can be formed that is consistent with the known structure. Racemization of enantiomers by rotation of the ligands on the …
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Pólya's Enumeration Theorem and Its Applications
… including necklaces, the cube, and the truncated icosahedron. The general formulas for the number of n-colorings of the latter two are also derived. In number theory, work by Chong-Yun Chao is presented, which uses PET to derive generalized versions of Fermat's Little Theorem and Gauss' Theorem. …
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Disdyakis Triacontahedron Discrete Global Grid System
… by our DGGS by comparing it to a traditional icosahedron DGGS using a similar projection. We demonstrate that our grid reduces angular distortion while allowing for real‑time rendering of data across the globe.
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Design of a large-scale virus capsid model for educational use
… with one another after manufacture to create an icosahedron. The protein was modeled using the SolidWorks computer aided drawing (CAD) software. The CAD model could then be converted to a file that enables us to mill a two part mold out of aluminum blocks. This aluminum mold will then be used to …
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Ab initio calculations of mechanical, thermodynamic and electronic structure properties of mullite, Iota-alumina and boron carbide
… and B₁₂-CCC where B₁₁C or B₁₂ is the 12-atom icosahedron and CBC or CCC is the three-atom chain. The simulations were performed on large supercells of 180 atoms. Simulated results indicate bending of the three-atom chain leads to the amorphization of the B₁₁C-CBC(B₁₂-CCC) at a uniaxial strain …
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Analysing and Enhancing the Coarse Registration Pipeline
… decrease in accuracy with respect to the icosahedron and the introduced Fibonacci schemes. Overall, equiangular binning was the most appropriate due to its natural affinity for fast spherical-harmonic conversion. Weighting normals was found to provide the greatest benefit to registration …
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Architecture and assembly of maize streak virus: insights from 3D electron microscopy
… (ssDNA) genome. Each T= I unit is an incomplete icosahedron assembled from 55 CPs. The structures of MSV and African cassava mosaic virus (ACMV, genus Begomovirus) have been studied by electron cryo- microscopy (cryo-EM) previously. While these investigations revealed some details about the …
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A Numerical Scheme for Mullins-Sekerka Flow in Three Space Dimensions
<p>The Mullins-Sekerka problem, also called two-sided Hele-Shaw flow, arises in modeling a binary material with two stable concentration phases. A coarsening process occurs, and large particles grow while smaller particles eventually dissolve. Single particles become spherical. This process is …